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SuperFOIL  |  SKU: SFTV1525

SuperFOIL SFTV Thermal Vapour Barrier (VCL) - 1.5m x 25m - 37.5m²

£57.62 Ex VAT
£69.14 Inc VAT
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A 2-in-1 Vapour Control Layer (VCL) and Radiant Barrier, the SuperFOIL SFTV is a Vapour Control Layer with a reflective finish that is designed to insulate heat from inside your property, and minimise overheating in warmer months as well as providing a barrier that reduces the transfer of moisture within the wall structure. 

Typically used on the “warm” (interior) side in wall structures, with an airtight seal. 

  • Achieves an R Value of 0.95 in Roofs, 1.42 in Walls and 2.80 in Floors
  • Ideal for New Builds, Extensions and retrofits
  • Simple installation with basic tools and supplies
  • Functions as both a VCL and Radiant Barrier

What is a Vapour Control Layer (VCL)? 

A vapour control layer (VCL), also known as a vapour barrier, is a material used in building construction to prevent the passage of water vapour through walls, ceilings, floors, or roofs. It is typically installed on the “warm” side of the insulation (typically the interior side) where it helps to control moisture levels within the building envelope. By blocking the movement of water vapour, a VCL helps to prevent condensation from occurring within the building structure, which can lead to issues such as mould growth, rot, and reduced insulation effectiveness.

What is a Radiant Barrier?

A radiant barrier is a type of material designed to reduce radiant heat transfer. Radiant barriers work by reflecting radiant heat away from the surface they cover, which helps to keep spaces cooler in the summer and warmer in the winter. They are often installed in attics, under roofs, or in walls where they can block the transfer of radiant heat from the sun or from indoor heating systems. By minimising radiant heat transfer, radiant barriers can help improve energy efficiency and increase comfort levels within buildings.

How to install SuperFOIL SFTV?

A vapour control layer should be applied on the interior side of any wall, roof or flooring, over timber studs before the internal lining. It should be 100% sealed to the structure with double-sided butyl tapes, pre-applied to all areas where a fixing is to be made, and finished with metallised tapes to ensure a complete vapour seal.

Data Sheets & Guides:

SuperFoil Under Rafter Installation Guide

SuperFoil Over Rafter Installation Guide

Super Foil External Wall Installation Guide

SuperFoil SFTV Data Sheet

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  • Size
    1500mm x 25m
  • Coverage (m²)
    37.5
  • Thickness
    1mm
  • Length
    25m
  • Width
    1.5m
  • Material
    Metallised Heavy Duty Polypropylene
  • Finish
    Metallised Polyester
  • Estimated Lifespan
    50+ Years
  • Thermal Resistance
    R Value: 0.95 - 2.80
  • Water Resistance
    1200MNs/g
  • Reaction to Fire
    Euroclass E

Large Order or Specific Requirement?

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0115 6976 800

Frequently Asked Questions

What is a Damp Proof Membrane?

Damp Proof Membranes (DPMs) are barriers often used in construction to prevent moisture from penetrating floors and walls. Made typically from a thick polyethylene sheeting, DPMs are often laid under concrete floors and walls to block moisture rising from the ground, thereby protecting interior spaces from dampness and mould.

What is a Breather Membrane?

A Breather Membrane is a semi-permeable layer that is designed to allow water vapour to escape from within a building while preventing liquid water from entering. They are installed on the “cold” side of a wall or roof structure (the “outward face” to ensure that the structure remains dry and free from condensation, which can lead to structural damage and poor insulation performance.

What is a Vapour Control Layer?

Vapour Control Layers (VCLs) are installed on the “warm” side of a wall or roof structure to limit the amount of water vapour that can pass through the structure. Unlike breather membranes, VCLs are designed to block vapour rather than allow it to pass, which helps prevent condensation within walls and roofs that leads to insulation degradation and structural damage. 

What is a Gas Barrier?

A Gas Barrier is a membrane used to prevent hazardous gases, such as radon, methane, and carbon dioxide, from entering a building. These barriers are especially important in areas with contaminated ground or high levels of natural gas emissions. Made from robust, impermeable materials, gas barriers are installed beneath the foundation to provide a protective seal, requiring an airtight seal with appropriate overlap tape.

What is a Radiant Barrier?

Many of our multifoil insulation products function as an insulation, a Vapour Control / Breather Membrane, and a Radiant Barrier. Radiant Barriers are designed to reflect radiant heat rather than absorb it. These barriers are typically installed in the attic or roof space to reduce heat transfer, keeping buildings cooler in summer and warmer in winter. By reflecting heat away, radiant barriers improve the energy efficiency of a building.

Our Popular Brands of VCLs, Breather Membranes and Damp Proofing